Specification for B4, C4 and P4 in Additonal Science (OCR21stC)

I used this to revise for my B4. C4 and P4 exams.
i printed it out as a handout with 2 slides on a sheet,
i then highlighted and made notes around the handout.
It covers 'what you need to know' for the exam.
i hope its useful, let me know !! <3